Expansion shoe-last.



nxransigon s'HoE-Lzis'r.'

rateniedeccai.1918.

Appncammmeaemcs, 191s. fsenai Namaste.

To fall 'wkomc't may concern:

Be it known that I, CLAYTON E. HURLBUT,

of lth'e town :of '-Brestom finilthe .rcountyfof I Waterloo, Province ofOntario, Canadag'fhaxre invented certain new and useful Improve- -Inentsin Expansion Shoe-Lasts, of which the following kis a specification.

This invention relates particularly to lasts used in the manufacture ofboots and shoes, and my object is to devise a last which may be insertedor withdrawn without spoiling the shape of the shoe, and particularly toprovide means for expandingwhich will leave both hands of the operatorfree for his work.

I attain my object by means of the constructions hereinafter describedand illustrated in the accompanying drawings in whichn Figure l is aplan view of my improved last;

Fig. 2 a vertical section showing the last contracted; and

Fig. 3 a similar view showing the last ex panded. i

In the drawings like numerals of reference indicate corresponding partsin the different figures.

The last is divided as shown adjacent theV heel to formthe forward part1 and the rearward part 2. These parts have formed through theiradjacent faces cylindrical recesses 3 and 4. There is preferably fittedkin the recess 3 a close fitting tube 5 and in the recess 4 a tube 6,which extends to form a piston closely fitting the tube 5. With therecess 4 communicates a cylindrical passageway 7 opening through the topof the rear part of the last. yInto this passageway may be fitted anipple 8 which may be of any suitable shape to receive a connection ofan air pipe. It is .evident that by admitting air pressure through thenipple 8 that the parts of the last will be forced apart so as to expandthe last longitudinally. In practice, the supply of air to the last willbe controlled by a pedal so that both the operators hands will be freefor his work.

When the last has been expanded in a shoe, it may be held expanded bymeans of, the latch 9, which is secured to one of the parts of the Vlastand is lipped to engagein a groove 10 in the other part of the last.

When the last is to be collapsed, this latch is easily pushed or priedup.

It will be evident, of course, that any ssuita'bleJflui-d may-:besubstituted for fcom'- pressed air.

AJromdihefabozve description it .will :be seen ,g-.that have devised alast which will satis- 2. A last formed in two parts with the line ofdivision adjacent the heel, the forward part havinga cylindrical recessformed in its rear end and a transverse groove across f its top; ahollow piston connected with the rear part and fitted into said recess,the said rear part having a passage formed therein communicating withthe interior of the piston and extending through the top; and a latchsecured to the rear part adapted to engage in the groove in the forwardpart when the parts are in their extended position.

3. A last formed in two parts with the line` of division adjacent theheel, the forward part having a cylindrical recess formed in its rearend and the rear part a cylindrical recess in alinement with the -recessin the forward part and a cylindrical passage extending from the top andcommunicating with the other recess; a nipple fitted in the outer end ofthe upwardly extending passage; a tube fitted into the recess intheforward part; and a tube tted into the alined recess in the rear partand extending asa piston into the tubein the forward part.

4. A last formed in two parts with theline of division adjacent theheel, the parts having alined cylindrical recesses formed in theiradjacent faces; and a tube secured in f one recess and projecting as apiston into the other recess, a passage being formed from their adjacentfaces and a transverse grooveacross the top of one of said parts; a tubesecured 1n one recess and projecting as a Vpiston into. the otherrecess; a passage be- 5 nected to the other part.

ing formed from thetdop of one cf thefp'rts 6. A last formed in twolparts With the line ing alned cylindrical recesses formed n theiradjacent faces and a passage extending 10 from the top of onerecess totheA top of the ypaa; e' cube 4fitted in: one of thel alined recesses; etubertted into the other recess and projecting as e piston into the rstmentioned vtube; and a nipple tted into the Oter'end of the upwardlyextending passage. y n

"Signed at Toronto, Canada, `thisStlLday CLAYTON E. HURLBUT.,

Copies of this patent may be obtained'for five cents each,byaddressing'the.Commissioner of Patents,

i Washington, D. (1.7 A

